Quick Summary
Sildenafil (Viagra)
Short-acting PDE5 inhibitor.
Duration: 4–6 hours
Onset: 30–60 minutes
Food: High-fat meals may delay effect
Vardenafil (Levitra)
PDE5 inhibitor with slightly stronger receptor selectivity.
Duration: 4–6 hours
Onset: 30–60 minutes
Food: Heavy meals may slow absorption
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Comparison Table
| Feature | Sildenafil | Vardenafil |
|---|---|---|
| Onset | 30–60 min | 30–60 min |
| Duration | 4–6 hours | 4–6 hours |
| Food interaction | Moderate | Moderate to high-fat sensitivity |
| Clinical note | Most widely prescribed ED drug | May work slightly better in some patients with diabetes |
Find the Right ED Medication
Compare sildenafil and vardenafil treatment profiles.
Compare sildenafil and vardenafil treatment profiles.
Key Differences
Sildenafil is the most widely used PDE5 inhibitor with extensive clinical data. Vardenafil has similar duration but slightly different pharmacological selectivity.
Both medications are fast-acting and typically taken 30–60 minutes before sexual activity.
Frequently Asked Questions
Both sildenafil and vardenafil belong to the same PDE5 inhibitor class and have similar effectiveness. Some patients may respond slightly better to one due to individual metabolism and sensitivity.
Both sildenafil and vardenafil typically start working within 30–60 minutes. Vardenafil may have slightly more consistent absorption in some patients.
Both medications have a similar duration of action, typically around 4–6 hours, with individual variation depending on dose and metabolism.
Both medications can be affected by heavy or high-fat meals, but vardenafil may have slightly less food sensitivity compared to sildenafil.
Some studies suggest vardenafil may work slightly better in men with diabetes-related ED, but both medications are commonly prescribed and effective.
Yes, switching is possible, but it should be done under medical supervision to ensure correct dosing and avoid overlap of effects.